*{
  margin: 0px;
  padding: 0px;
}
img {
    width: 100%;
    height: 100%;
    vertical-align:center;
}

 html, body{
   font-family: "Arial", "Microsoft YaHei", "黑体", "宋体", "微软雅黑", sans-serif;
   overflow: hidden;
 }
 body{
   line-height: 1;
   -webkit-text-size-adjust: none;
 }
 html{
   overflow-y: scroll;
 }
a{
  text-decoration: none;
}
 /*清除浮动*/
 .clearfix:before,
 .clearfix:after{
   content: " ";
   display: inline-block;
   height: 0;
   clear: both;
   visibility: hidden;
 }
 .clearfix{
   *zoom: 1;
 }
  
 /*隐藏*/
 .dn{
   display: none;
 }
 
 